Max cfm: 55/93m³h @ 0.1 sec contact time Prefilter: Optional Mounting: Bayonet Flange: Optional, 4"/5" Dimensions: (with pre-filter) ·Outside Diameter: 140mm/5.5" ·Height: 600mm/25" ·Carbon Weight: 3kg/6.6lbs. Pressure drop at max cfm: 42pa/ .20wg